Latch and lock com bin ed



(No Model.)

J. E. ARMSTRONG.

LATCH AND LOOK COMBINED. No. 483,318. Patented Sept. 27, 1892,.

NiTn STATES PATENT Crmcn.

`JOHN E. ARMSTRONG, CF SANTA CRUZ, CALIFORNIA.

LATCH AND LOCK COMBINED.

SPECIFICATION forming part of Letters Patent No. 483,318, dated September 2'?, 1892.

Application filed April 29, 1892.

To all whom it may concern,.-

Be it known that I, JOHN E. ARMSTRONG, a citizen of the United States, residing at Santa Cruz, Santa Cruz county, State of California, have invented an Improvement in Door- Locks; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to door-locks; and it consists in the constructions and combinations of devices which I shall hereinafter fully describe and claim.

Referring to the accompanying drawings for a more complete explanation of my invention, Figure l is a vertical section in the line 0f the bolt-sheath. Fig. 2 is a vertical section in the line of the knob-spindle. Fig. 3 is a horizontal section of the door, exposing the knob-spindle and bolt-sheath in plan.

A is the door. In this is made from its edge a hole, in which is seated the sheath B for the reciprocating latch-bolt C, said sheath being held in place by the escutcheon of screwplate b. The latch-bolt C has an outer beveled end to enable it to operate properly against the striking-plate on the door-jamb. The bolt has a stem or shank c, which, though it may be made integral with said bolt, is preferably a separate piece` as shown, and held to it by a set-screw c. This connection Will permit the bolt by being turned on the shank and again secured to present its beveled end in opposite directions and to be used on either right or left Without affecting its operating mechanism. The sheath B near its inner end is recessed at l1 and slotted backwardly at b2. The shank c of the latchbolt has a contact-lug c2 exposed in the recess b of the sheath and guided in its movement at all times by the slot b2. The latch bolt is held normally projected by means of a spring o3 within the sheath. Through the door is made a hole at right angles to the hole in which the sheath B is seated. In this hole is fitted the knob-spindle D, adapted to have both a rotary and a longitudinal movement therein. This spindle crosses the sheath B at right angles and lies in its recess b. Its side is provided with a notch, forming an inclined plane or cam d, which bears against the front of the contact-lug c2 of the latch-bolt. Now it will be seen that if the knob-spindle `Serial No. 431,214. (No model.)

be rotated in either direction its inclined plane, bearing with either its top or bottom edges against lug c2, will force said lug back and withdraw the latch-bolt; also, if the spindle be moved in the direction of its length its inclined plane moving past lug c2 will force said lug back and withdraw the latch-bolt. The spindle is controlled in both these movements by a suitable spring or springs. I have here shown a single spring to control both movements. This spring E is a spiral one, its main portion being fitted within the hollow end of the spindle and bearing at one end against ah end abutment of said spindle. At the other end the spring turns outwardly and forms the coil port-ion e, the extremity of which' is secured to a rose-plate F on the door. Where the coil e emerges from the Spindle, it is strengthened or stilfened by a contact-post c', which abuts against the rose-plate F and plays in an elongated slot d on thespindle. The main body of the spring within the spindle will by its compression, due to the contact of post e with the rose-plate, control the longitudinal movement of the spindle, while the outer or coil portion e will control its rotary movement. This coil portion, which is on the outer side of the door, is concealed by a suitable rosette G. A knob I-I is suitably secured on the outer end of the spindle.

To lock the spindle to prevent it from either rotating or being moved lengthwise, I make in it a notch or groove cl2. Fitted over the inner end of the spindle and screwed to the inner side of the door is a rose-plate I, having on its inner surface a sliding catch J, controlled bya springj. The normal position of this catch is elevated; but when depressed it engages the notch or groove cl2 of the spindle D and holds it. The catch is forced and held down by a cam K, which bears on a cross-head j of said catch. The cam is on a rock-shaft or pin It, operated from the inside of the door by a turn-button 7c. It is operated from the outside of the door by means of a key L, the inner end of which is adapted to fit in a groove k2 in the cam. This groove is reached by the key only by passing through a peculiar keyway. This keyway consists of a passage or slot m made in a rotary piece M, seated in a hole in the door and heldin place bya screwplate m on the outside of the door. This key- IOO way is made on a spiral or twist, and the key is correspondingly curved or twisted. The difference in the pitch andthe number of turns of this twist makes the necessary difference in the keys ot different locks. The notch or groove d2 in the spindle, which rei ceives catch J, is concealed by a short ange Y serts his key.

t', extending from the rose-plate I and encircling the spindle. A suitable knob IVI is titted to the inner end of the. spindle.

The operation of the door-lock is as follows: Approachingfrom without, the person who wishes to entier, nding the door locked, in-

It passes through the keyway and engages the grooved end of cam K, which had been turned, so as to press and hold down the catch J. YTurning the cam, he relieves the catch J, which rises under the power of the springj, andthus is removed from the notch orgroove (12in the knob-spindle. IIe can now either turn the knob or push it. Either Way will retract the latch-bolt, as heretofore described. I-Iaving opened the door, entered, andY closed it behind him,he wishes to lock it. This he does by turning the button 1h', which turns the cam and t'orces the catch J down to its engagement. Then he wishes to go out, he turns the button again to relieve th e catch, and he can thereupon either turn the inside knob or pull on it to withdraw the latch-bolt.

In applying the lock it will be seen that, instead of the usual mortise, there need be made only a small hole inwardly from-'the edge of the door to receive the sheath YHaving Vthus.descriloedimy invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In ardoor-lock, the combination of the sheath B to be let into the edge of thedoor, Said sheath having a recess and slotted guide on its inner end, the reciprocating latch-bolt mounted 4in said sheath and having a contactlug playing in the recess and guide thereof, and the axially-turnable and longitudinallymovable knob spindle crossing the recess of the sheath and having au inclined plane engaging the lug of the latch-bolt, whereby the bolt is retractedL on either movement of the spindle, substantially as herein described.

2. In a door-iook, the combination of the movable knob-spindle for operating the latchbolt, said spindle having a notch or groove, the spring-controlled catch adapted to engage the notch or groove to lock the spindle, the turnable cam for operating the catch, said cam having a groove to receive the key and the turnable piece with its spiral or twisted keyway or passage, Ysubstantially as herein described.

3. In a door-lock, the combination of the movable knob-spindle for operating the latchbolt, said spindle having a notch or groove,

the spring-controlled catch adapted to engage the notch or groove to lock the spindle, the turnable cam for operating the catch, said cam having a groove to receive the key, the turnable piece with its spiral or twisted keyway or passage, and the turn-button on the other side to operate said cam, substantially as herein described.

4. A door-lock comprising a reciprocating latch-bolt provided with a contact-lug, an axially-turnable and longitudinally-movable knob-spindle having an inclined plane en gaging the contact-lug ofthe latch-bolt to retract the latter upon either movement of the spindle, and a locking device engaging the knobspindle tohold it from moving, consisting of the spring-controlled catch engaging a notch or groove in the lock-spindle and a turnable cam to operate said catch, substantially as herein described. i

5. A door-lock comprising a reciprocating latch-bolt provided with a contact-lug, an axially-turnable and longitudinally-movable knob-spindle having an inclined plane engaging the contact-lug of the latch-bolt to retract the latter-upon either movement of the spindle, and a locking device engaging the knobspindle to hold it from moving, consisting of the spring-controlled catch engaging a notch or groove in the lock-spindle, a turnable cam to operate said cat-ch,said cam havinga groove to receive a key, and the turnable piece with its spiral or twisted keyway or passage, substantially as herein described.

6. A door-lock comprising a reciprocating latch bolt provided with a contact-lug, an axially-turnable and longitudinally-movable knob-spindle having an inclined plane engaging the contact-lug of the latch-bolt to retract the latter upon either movement of the spindle, and a locking device engaging the knobspindle to hold it from moving, consisting of the spring-controlled catch engaging a notch or groove in the lock-spindle, a turnable cam to operate said catclnsaid cam having a groove to receive a key, the turnable piece with :its spiral or twisted keyway or passage, and the turn-button on the opposite side to operate said cam, substantially as herein described.

7. In a door-lock, the reciprocating latchbolt having the beveled outer end, in combination with the separate shank or stem,on which said bolt is fitted and is adapted to turn, whereby it may be reversed, and the set-screw for holding it in position, substantially as herein described.

In witness whereof I have hereunto Yset my hand.

JOHN E. ARMSTRONG.

Vitnesses:

I. L. BLalsDnLL, N. S. FROST.

IOO

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